header{
    width: 100%;
    background-color: #18A9B9;
    text-align: center;
    display: flex;
    line-height: 0.44rem; 
}
header a{
    display: block;    
}
header h3{
    width: 2.55rem;
    height: 0.44rem;
}
header a:nth-child(1){
    width: 0.66rem;
    height: 0.44rem;
}
header a:nth-child(3){
    width: 0.66rem;
    height: 0.44rem;
}
nav{
    background-color: #18A9B9;
    /* text-align: center; */
    /* overflow: hidden; */
    height: 0.45rem;
}
.iu{
    width: 3.52rem;
    border-radius: 5px;
    border: 2px solid white;
    display: flex;
    justify-content: space-evenly;
    margin: 0 auto; 
}
.a6{
    width: 1.36rem;
    height: 0.32rem;
    display: block;
    background-color: #18A9B9;
    color: white;
    flex-grow: 1
}
.a7{
    background-color: white;
    color: #18A9B9;
}
.a1{
    border-top: 1px solid gainsboro;
    border-bottom: 1px solid gainsboro;
    height: 0.45rem;
    line-height: 0.45rem;
}
.a1 span{
    color: #18A9B9;
}
.a1 button{
    padding: 0.05rem 0.1rem;
    color: gainsboro;
    background-color: white;
    border: 1px solid gainsboro;
    
}
.a2{
    margin: 0.2rem 0;
}
.a3{
    width: 3.55rem;
    margin: 0 auto;
}
aside p{
    width: 2.1rem;
    margin: 0.2rem auto;
    font-size: 0.12rem;
    color: gainsboro; 
}
footer{
    position: fixed;
    bottom: 0;
}
.a4{
    width: 3.75rem;
    display: flex;
    justify-content: space-evenly;
}
.a4 div{
    width: 1rem;
    color: #18A9B9;
    text-align: center;
    font-size: 0.13rem;
}
.a5{
    border-top: 1px solid gainsboro;
    height: 0.48rem;
    text-align: center;
    line-height: 0.48rem;
    color: gainsboro;
    font-size: 0.12rem;
}
.a8{
    position: fixed;
    right: 0;
    top: 40%;
}